Transactional SMS

Transactional SMS API

MailerSend’s transactional SMS API enables you to enhance the customer experience by sending high-volume, toll-free SMS using a unique and recognizable phone number.


Reach more customers with toll-free messaging

Improve the customer experience and enjoy high delivery and open rates by sending timely SMS messages directly to recipients’ mobile phone numbers.

Multiple sending configurations

Send qualified SMS text messages to opt-in recipients, triggered by their actions or your email flow.
Automatically stop sending when they opt out.


Customize messages to fit your brand

Your brand is your most valuable asset—make it shine while building stronger customer relationships with pre-made templates, GIFs and images.


Developer-friendly resources

Start to send and receive SMS in minutes with our regularly updated SDK libraries, low-code/no-code integrations and comprehensive API documentation.


Spark conversations

Take customer service to the next level by allowing recipients to reply and engage in conversations via SMS.

Plus, the same great MailerSend features:

Easy management

Manage multiple phone numbers from your API, keeping suppressions and templates separate.

Activity & Analytics

View your activity in real-time to gain insights about SMS delivery and recipient activity and make adjustments when needed.

Account management

Effortlessly manage each user and their level of access to your emails, SMS activity or individual phone numbers.

Frequently Asked Questions

Where is SMS coverage available?

As of now, MailerSend's SMS coverage is available in North America. We are working on bringing coverage to additional regions, with availability coming to Europe in the second half of 2023.

What types of SMS can I send?

You can send any type of message in relation to your business as long as you have received opt-in consent and follow the Telephone Consumer Protection Act guidelines.

This includes, but is not limited to, shipping notifications, delivery updates, 2-factor authentication, appointment and event reminders, emergency alerts, one-time passwords, order status updates, booking/reservation confirmation and cancellation, payment and billing alerts, and general alerts, notices and updates.

What phone number can I use?

Toll free numbers will be available for purchasing through the app.

Do I need consent for transactional SMS?

Although opt-in consent isn’t needed for transactional email, to send messages to a recipient’s phone number, you must have first received consent to do so. 

As well as complying with the Telephone Consumer Protection Act (TCPA), receiving clear, informed opt-in consent from recipients will also ensure higher levels of engagement and lower opt-out rates.

How do I receive SMS replies?

With MailerSend's inbound routing feature, you can create inbound routes to have MailerSend receive incoming messages on your behalf and integrate them into your app.

Does this work for 2FA texts?

Yes, you can use MailerSend's SMS API to send 2-factor authentication (2FA) texts.

Enrich the customer experience with SMS notifications

Get started with real-time SMS service for appointment reminders, two-factor authentication, time-sensitive notifications, service alerts, booking/order confirmation, and more using our REST API.

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